Water-filter.



M. G. MELVIN.

WATER FILTER; nruonron rmm rmza, 190a.

Patented Nov. 29, 1910.

UNITED STATES PATENT @FFTQE.

MARK G. MELVIN, OF SCRANTON, PENNSYLVANIA, ASSIGNOR, BY DIRECT AND'MESNE ASSIGNMENTS, OF THREE-EIGHTI-IS T0 JULIUS D. STEVENS, OF SCRANTON, PENN- SYLVANIA, AND TI-IREE-EIGI-ITHS TO STERLING SALES COMPANY, OF SCRANTON, PENNSYLVANIA, A CORPORATION OF DELAWARE.

WATER-FILTER.

To all whom it may concern:

Be it known that 1, MARK Gr. MELVIN, a citizen of the United States, residing at Scranton, in the county of Lackawanna and State of Pennsylvania, have invented new and useful Improvements in -Water-Filters, of which the following is a specification.

This invention relates to filters of that type having a porous wall, and more especially to the means for cleaning the same; and the objects of the invention are to construct a cleaner whose sharp edge will be pressed by its weight onto the cylindrical filter stone, and a casing especially shaped to contain the parts and to permit the ready removal of the cleaner without necessarily disconnecting the parts of the casing.

lVith these objects in view and others, as will appear as the description proceeds, the invention comprises the various novel features of construction and arrangement of parts which will be more fully described hereinafter and set forth with particularity in the claim appended hereto.

In the accompanying drawing, which illustrates one embodiment of the invention, Figure 1 is a central longitudinal section taken vertically through the filter. Fig. 2 is an end view thereof. Fig. 8 is a central transverse section on line 3-3, Fig. 1. Fig. 4 is a fragmentary perspective view of the holder for the cleaning knife. 4

Similar reference characters are employed to designate corresponding parts throughout the views.

Referring to the drawing, A designates the cylindrical casing of the filter which is preferably castwith open ends and with a central hollow boss 1 at the rear and an outlet 2 at the bottom. The casing is disposed in a horizontal position and is supported on a service pipe by attaching the boss 1 thereto and the drain outlet 2 is adapted to receive a faucet whereby the casing can be cleaned from time to time. The ends of the cylindrical casing are formed with internal annular fianges 3 and the heads 4 and 5 are secured to the respective flanges by bolts 6. The head 4 has an outlet spout 7 that is adapted to receive a faucet for drawing off the filtered water and the inner end of the spout is formed with a bearing 8. The head 5 has an opening 9 disposed in line with the Specification of Letters Patent.

Application filed February 25, 1909.

Patented Nov. 29, 1910. Serial No. 479,896.

bearing 8 and constitutes a bearing for one end of a shaft 10 that carries the filtering element B, the other end of the shaft being disposed in the bearing 8. The head 5 has an external packing box 11 extending around the projecting end of the shaft 10 and the head 4 has an internal packing box 12 surrounding the shaft at the opposite end. The packing 11 prevents water from leaking out of the casing while the packing 12 prevents dirty water from passing into the outlet 7 and mixing with the filtered water. The shaft 10 is hollow and is provided with apertures 13 communicating with a central chamber 14 in the filtering element or stone B which latter is of cylindrical form. On the shaft 10 are raised threads 100 engaged by clamping nuts 15 that abut against the ends of the filtering element to secure the same to the shaft and to form closures for the ends of the chamber 14 in the filtering element. Into the projecting end of the shaft 10 is screwed a plug 160 on an operating crank 16. The water to be filtered passes into the casing through the inlet 1 and surrounds the filtering element and percolates through the pores thereof to the chamber 14, and thence passes through apertures 13 into and along the shaft 10 and out the discharge spout 7 when the faucet connected with the latter is opened.

In order to clean the outer surface of the filtering element from time to time so as to facilitate the filtering operation, a cleaning knife 17 is arranged horizontally over and in contact with the top of the filtering element, the knife being so arranged as to rest by gravity on the filtering element to cause the sharp cutting edge 18 thereof to effectively scrape off the mud or other foreign matter collecting on the filtering element. The scraper or knife 17 is held loosely in a holder consisting of a pair of arms 18 having inverted U-shaped extremities or fork 19 or bifurcations which straddle the scraper, the latter fitting in the bifurcations loosely so that the arms will not interfere with the scraper resting on the knife. The arms are mounted on a square shaft 20 extending longitudinally of the casing, the ends of the shaft being formed into journals 21 and 22. The journal 21 is disposed in a depression 23 on the head 5, as shown in Figs. 2 and 4, while the journal 22 is dis posed in a bearing 2% 1n the head 4 and pro- ]ecting out of the head so as to receive a hand wheel 25 or equivalent means, and at the point where the journal 22 extends out of the head is a packing box 26 for preventing leakage. Ordinarily, the weight of the scraper will be sufiicientto clean the filtering element as the crank 16 is turned, but in case the matter becomes so fixed on the filtering element as not to be freely removed, the operator can apply pressure to the scraper by turning the hand wheel 25 in a direction to firmly force the scraper against the filtering element while the latter is rotated with the other hand. After this scraping operation, the drain faucet is opened so that the casing can be thoroughly flushed out. In the head 5 of the casing is an opening 26 disposed in line with the scraper 17 so that the latter can be taken out longitudinally therethrough when sharpening or cleaning is necessary. This opening is normally closed by a screw plug 27 or equivalent means.

It will bestbe seen from Fig. 3 that the filtering element or stone B is eccentric to the casing and that its axis stands below the true axis of the casing so that the latter has quite a space above the stone within which the cleaner is located. At one end of this space occurs the opening 26 closed by the plug 27, and they stand directly opposite the normal position of the scraper 17 as shown. Vhenever the stone is rotated by the crank, the cutting edge of the scraper by its own weight bears upon the stone whether pressure is applied tothe hand wheel 25 or not, and in fact the turning of this wheel in one direction may lift the forks 13) oil the scraper but will not raise the scraper off the stone. \Vhen said cutting edge becomes dull, or when it is desired to reverse the position of the scraper either side for side or top for bottom so as to bring a new cutting edge or corner into play, it is only necessary to remove the plug 27 and reach in with a proper tool and withdraw the scraper longitudinally from the forks 19. Therefore I consider it of advantage that the scraper shall be mounted loosely in said forks, and that the stone be journaled eccentrically within the casing.

Having thus described the invention, what I claim is In a filter, the combination with a cylindrical casing having hearings in its heads beneath its axis and an opening in one head above such axis, a cylindrical filtering element mounted on a shaft journaled in said bearings and having an exterior crank, inlet and outlet pipes, and means for closing said openin of a scraper support comprising a rock shaftjournaled in said heads and having a hand wheel on one of its extremities, arms projecting from said shaft and U- shaped forks on said arms opening downward. and a scraper loosely mounted in said forks opposite said opening in the head of the casing and with its cutting edge resting by gravity on the filter element.

In testimony whereof I atlix my signature in presence of two witnesses.

MARK G. MELVIN.

Witnesses JOSEPH F. GILROY, E. I. FELLOWS. 

